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FILE - In this Sept. 15, 2011, file photo Capt. Michael Kolton, 28, of Fairfax Station, Va., commanding officer of the U.S. Army's Bravo Company of the 25th Infantry Division, 3rd Brigade Combat Team, 2nd Battalion 27th Infantry Regiment based in Schofield Barracks, Hawaii, turns from the rotor wash of a Blackhawk helicopter, following a key leader engagement at the Shigal district center in Kunar province, Afghanistan. The Afghanistan conflict, which marks its 10th anniversary Friday, Oct. 7, 2011, is in many ways a helicopter war. Army aviators fly attack missions, ferry troops and supplies and evacuate the wounded; they are in ever-increasing demand even as America eyes the exit in Afghanistan. (AP Photo/David Goldman, File)
/ AP